Answer:
The correct answer is: Neural plasticity.
Step-by-step explanation:
The concept neural plasticity is one frequently studied in medicine, psychology, neuro-psychology and psychiatry and it refers to the ability that the neurons have to modify their function and forms in response to the environmental needs of the individual.
In this particular case, Dave is congenitally deaf but his brain has adapted the brain systems that would normally be involved in hearing and processing spoken language for processing visual information due to Neural Plasticity.